.div-error {
    margin-top: 10px;
}

#div-mainview {
    margin-top: 60px;
}

#div-dialog,
#div-loader,
#div-confirm,
#div-prompt,
#div-exercise-select-dialog {
    display: none;
}

.collapsing {
    transition: none;
    -webkit-transition: none;          
}

.middle {
    vertical-align: middle !important;
}

.margin-left {
    margin-left: 5px;
}

.width20pc {
    width: 20%
}